Implant Attack var addthis_config = {"data_track_addressbar":true};

An Implant Attack is a Tyranid biomorph of hollow fangs, barbed stingers, or serrated claws that are capable of inflicting massive internal injuries to a victim and bleeding them to death in seconds ², as well as filling the victim with fatal toxins and poisons.¹

Sources

• ¹:Codex: Tyranids (4th Edition), p.32
• ²: Codex: Tyranids (5th Edition), p.84